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mtd: rawnand: gpmi: add support for specific ECC strength

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Add support for specified ECC strength/size using device tree
properties nand-ecc-strength/nand-ecc-step-size.

Signed-off-by: Stefan Agner <stefan@agner.ch>
Acked-by: Han Xu <han.xu@nxp.com>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
This commit is contained in:
Stefan Agner 2018-03-04 21:06:01 +01:00 committed by Boris Brezillon
parent 69fb4ca07c
commit 6bf6ec522e
1 changed files with 20 additions and 10 deletions
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30
drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c
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@ -198,17 +198,16 @@ static inline bool gpmi_check_ecc(struct gpmi_nand_data *this)
*
* We may have available oob space in this case.
*/
static int set_geometry_by_ecc_info(struct gpmi_nand_data *this)
static int set_geometry_by_ecc_info(struct gpmi_nand_data *this,
unsigned int ecc_strength,
unsigned int ecc_step)
{
struct bch_geometry *geo = &this->bch_geometry;
struct nand_chip *chip = &this->nand;
struct mtd_info *mtd = nand_to_mtd(chip);
unsigned int block_mark_bit_offset;
if (!(chip->ecc_strength_ds > 0 && chip->ecc_step_ds > 0))
return -EINVAL;
switch (chip->ecc_step_ds) {
switch (ecc_step) {
case SZ_512:
geo->gf_len = 13;
break;
@ -221,8 +220,8 @@ static int set_geometry_by_ecc_info(struct gpmi_nand_data *this)
chip->ecc_strength_ds, chip->ecc_step_ds);
return -EINVAL;
}
geo->ecc_chunk_size = chip->ecc_step_ds;
geo->ecc_strength = round_up(chip->ecc_strength_ds, 2);
geo->ecc_chunk_size = ecc_step;
geo->ecc_strength = round_up(ecc_strength, 2);
if (!gpmi_check_ecc(this))
return -EINVAL;
@ -230,7 +229,7 @@ static int set_geometry_by_ecc_info(struct gpmi_nand_data *this)
if (geo->ecc_chunk_size < mtd->oobsize) {
dev_err(this->dev,
"unsupported nand chip. ecc size: %d, oob size : %d\n",
chip->ecc_step_ds, mtd->oobsize);
ecc_step, mtd->oobsize);
return -EINVAL;
}
@ -423,9 +422,20 @@ static int legacy_set_geometry(struct gpmi_nand_data *this)
int common_nfc_set_geometry(struct gpmi_nand_data *this)
{
struct nand_chip *chip = &this->nand;
if (chip->ecc.strength > 0 && chip->ecc.size > 0)
return set_geometry_by_ecc_info(this, chip->ecc.strength,
chip->ecc.size);
if ((of_property_read_bool(this->dev->of_node, "fsl,use-minimum-ecc"))
|| legacy_set_geometry(this))
return set_geometry_by_ecc_info(this);
|| legacy_set_geometry(this)) {
if (!(chip->ecc_strength_ds > 0 && chip->ecc_step_ds > 0))
return -EINVAL;
return set_geometry_by_ecc_info(this, chip->ecc_strength_ds,
chip->ecc_step_ds);
}
return 0;
}